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* elflink.c (_bfd_elf_gc_mark_hook): New function.
[binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *));
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
71 PARAMS ((bfd *));
72 static int elf_s390_tls_transition
73 PARAMS ((struct bfd_link_info *, int, int));
74 static bfd_reloc_status_type s390_tls_reloc
75 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
76 static bfd_vma dtpoff_base
77 PARAMS ((struct bfd_link_info *));
78 static bfd_vma tpoff
79 PARAMS ((struct bfd_link_info *, bfd_vma));
80 static void invalid_tls_insn
81 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
82 static bfd_reloc_status_type s390_elf_ldisp_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84
85 #include "elf/s390.h"
86
87 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
88 from smaller values. Start with zero, widen, *then* decrement. */
89 #define MINUS_ONE (((bfd_vma)0) - 1)
90
91 /* The relocation "howto" table. */
92 static reloc_howto_type elf_howto_table[] =
93 {
94 HOWTO (R_390_NONE, /* type */
95 0, /* rightshift */
96 0, /* size (0 = byte, 1 = short, 2 = long) */
97 0, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_390_NONE", /* name */
103 FALSE, /* partial_inplace */
104 0, /* src_mask */
105 0, /* dst_mask */
106 FALSE), /* pcrel_offset */
107
108 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
110 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
111 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
112 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
114 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
116 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
118 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
126 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
128 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
132 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
136 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
138 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
140 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
142 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
146 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
148 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
150 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
152 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
154 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
156 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
160 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
187 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
192 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
195 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
198 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
202 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
203 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
206 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
222 };
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf64_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf64_s390_vtentry_howto =
228 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
229
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234 {
235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_64:
284 return &elf_howto_table[(int) R_390_64];
285 case BFD_RELOC_64_PCREL:
286 return &elf_howto_table[(int) R_390_PC64];
287 case BFD_RELOC_390_GOT64:
288 return &elf_howto_table[(int) R_390_GOT64];
289 case BFD_RELOC_390_PLT64:
290 return &elf_howto_table[(int) R_390_PLT64];
291 case BFD_RELOC_390_GOTENT:
292 return &elf_howto_table[(int) R_390_GOTENT];
293 case BFD_RELOC_16_GOTOFF:
294 return &elf_howto_table[(int) R_390_GOTOFF16];
295 case BFD_RELOC_390_GOTOFF64:
296 return &elf_howto_table[(int) R_390_GOTOFF64];
297 case BFD_RELOC_390_GOTPLT12:
298 return &elf_howto_table[(int) R_390_GOTPLT12];
299 case BFD_RELOC_390_GOTPLT16:
300 return &elf_howto_table[(int) R_390_GOTPLT16];
301 case BFD_RELOC_390_GOTPLT32:
302 return &elf_howto_table[(int) R_390_GOTPLT32];
303 case BFD_RELOC_390_GOTPLT64:
304 return &elf_howto_table[(int) R_390_GOTPLT64];
305 case BFD_RELOC_390_GOTPLTENT:
306 return &elf_howto_table[(int) R_390_GOTPLTENT];
307 case BFD_RELOC_390_PLTOFF16:
308 return &elf_howto_table[(int) R_390_PLTOFF16];
309 case BFD_RELOC_390_PLTOFF32:
310 return &elf_howto_table[(int) R_390_PLTOFF32];
311 case BFD_RELOC_390_PLTOFF64:
312 return &elf_howto_table[(int) R_390_PLTOFF64];
313 case BFD_RELOC_390_TLS_LOAD:
314 return &elf_howto_table[(int) R_390_TLS_LOAD];
315 case BFD_RELOC_390_TLS_GDCALL:
316 return &elf_howto_table[(int) R_390_TLS_GDCALL];
317 case BFD_RELOC_390_TLS_LDCALL:
318 return &elf_howto_table[(int) R_390_TLS_LDCALL];
319 case BFD_RELOC_390_TLS_GD64:
320 return &elf_howto_table[(int) R_390_TLS_GD64];
321 case BFD_RELOC_390_TLS_GOTIE12:
322 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
323 case BFD_RELOC_390_TLS_GOTIE64:
324 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
325 case BFD_RELOC_390_TLS_LDM64:
326 return &elf_howto_table[(int) R_390_TLS_LDM64];
327 case BFD_RELOC_390_TLS_IE64:
328 return &elf_howto_table[(int) R_390_TLS_IE64];
329 case BFD_RELOC_390_TLS_IEENT:
330 return &elf_howto_table[(int) R_390_TLS_IEENT];
331 case BFD_RELOC_390_TLS_LE64:
332 return &elf_howto_table[(int) R_390_TLS_LE64];
333 case BFD_RELOC_390_TLS_LDO64:
334 return &elf_howto_table[(int) R_390_TLS_LDO64];
335 case BFD_RELOC_390_TLS_DTPMOD:
336 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
337 case BFD_RELOC_390_TLS_DTPOFF:
338 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
339 case BFD_RELOC_390_TLS_TPOFF:
340 return &elf_howto_table[(int) R_390_TLS_TPOFF];
341 case BFD_RELOC_390_20:
342 return &elf_howto_table[(int) R_390_20];
343 case BFD_RELOC_390_GOT20:
344 return &elf_howto_table[(int) R_390_GOT20];
345 case BFD_RELOC_390_GOTPLT20:
346 return &elf_howto_table[(int) R_390_GOTPLT20];
347 case BFD_RELOC_390_TLS_GOTIE20:
348 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
349 case BFD_RELOC_VTABLE_INHERIT:
350 return &elf64_s390_vtinherit_howto;
351 case BFD_RELOC_VTABLE_ENTRY:
352 return &elf64_s390_vtentry_howto;
353 default:
354 break;
355 }
356 return 0;
357 }
358
359 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
360 and elf64-s390.c has its own copy. */
361
362 static void
363 elf_s390_info_to_howto (abfd, cache_ptr, dst)
364 bfd *abfd ATTRIBUTE_UNUSED;
365 arelent *cache_ptr;
366 Elf_Internal_Rela *dst;
367 {
368 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
369 switch (r_type)
370 {
371 case R_390_GNU_VTINHERIT:
372 cache_ptr->howto = &elf64_s390_vtinherit_howto;
373 break;
374
375 case R_390_GNU_VTENTRY:
376 cache_ptr->howto = &elf64_s390_vtentry_howto;
377 break;
378
379 default:
380 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
381 {
382 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
383 abfd, (int) r_type);
384 r_type = R_390_NONE;
385 }
386 cache_ptr->howto = &elf_howto_table[r_type];
387 }
388 }
389
390 /* A relocation function which doesn't do anything. */
391 static bfd_reloc_status_type
392 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
393 output_bfd, error_message)
394 bfd *abfd ATTRIBUTE_UNUSED;
395 arelent *reloc_entry;
396 asymbol *symbol ATTRIBUTE_UNUSED;
397 PTR data ATTRIBUTE_UNUSED;
398 asection *input_section;
399 bfd *output_bfd;
400 char **error_message ATTRIBUTE_UNUSED;
401 {
402 if (output_bfd)
403 reloc_entry->address += input_section->output_offset;
404 return bfd_reloc_ok;
405 }
406
407 /* Handle the large displacement relocs. */
408 static bfd_reloc_status_type
409 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
410 output_bfd, error_message)
411 bfd *abfd;
412 arelent *reloc_entry;
413 asymbol *symbol;
414 PTR data;
415 asection *input_section;
416 bfd *output_bfd;
417 char **error_message ATTRIBUTE_UNUSED;
418 {
419 reloc_howto_type *howto = reloc_entry->howto;
420 bfd_vma relocation;
421 bfd_vma insn;
422
423 if (output_bfd != (bfd *) NULL
424 && (symbol->flags & BSF_SECTION_SYM) == 0
425 && (! howto->partial_inplace
426 || reloc_entry->addend == 0))
427 {
428 reloc_entry->address += input_section->output_offset;
429 return bfd_reloc_ok;
430 }
431 if (output_bfd != NULL)
432 return bfd_reloc_continue;
433
434 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
435 return bfd_reloc_outofrange;
436
437 relocation = (symbol->value
438 + symbol->section->output_section->vma
439 + symbol->section->output_offset);
440 relocation += reloc_entry->addend;
441 if (howto->pc_relative)
442 {
443 relocation -= (input_section->output_section->vma
444 + input_section->output_offset);
445 relocation -= reloc_entry->address;
446 }
447
448 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
449 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
450 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
451
452 if ((bfd_signed_vma) relocation < - 0x80000
453 || (bfd_signed_vma) relocation > 0x7ffff)
454 return bfd_reloc_overflow;
455 else
456 return bfd_reloc_ok;
457 }
458
459 static bfd_boolean
460 elf_s390_is_local_label_name (abfd, name)
461 bfd *abfd;
462 const char *name;
463 {
464 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
465 return TRUE;
466
467 return _bfd_elf_is_local_label_name (abfd, name);
468 }
469
470 /* Functions for the 390 ELF linker. */
471
472 /* The name of the dynamic interpreter. This is put in the .interp
473 section. */
474
475 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
476
477 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
478 copying dynamic variables from a shared lib into an app's dynbss
479 section, and instead use a dynamic relocation to point into the
480 shared lib. */
481 #define ELIMINATE_COPY_RELOCS 1
482
483 /* The size in bytes of the first entry in the procedure linkage table. */
484 #define PLT_FIRST_ENTRY_SIZE 32
485 /* The size in bytes of an entry in the procedure linkage table. */
486 #define PLT_ENTRY_SIZE 32
487
488 #define GOT_ENTRY_SIZE 8
489
490 /* The first three entries in a procedure linkage table are reserved,
491 and the initial contents are unimportant (we zero them out).
492 Subsequent entries look like this. See the SVR4 ABI 386
493 supplement to see how this works. */
494
495 /* For the s390, simple addr offset can only be 0 - 4096.
496 To use the full 16777216 TB address space, several instructions
497 are needed to load an address in a register and execute
498 a branch( or just saving the address)
499
500 Furthermore, only r 0 and 1 are free to use!!! */
501
502 /* The first 3 words in the GOT are then reserved.
503 Word 0 is the address of the dynamic table.
504 Word 1 is a pointer to a structure describing the object
505 Word 2 is used to point to the loader entry address.
506
507 The code for PLT entries looks like this:
508
509 The GOT holds the address in the PLT to be executed.
510 The loader then gets:
511 24(15) = Pointer to the structure describing the object.
512 28(15) = Offset in symbol table
513 The loader must then find the module where the function is
514 and insert the address in the GOT.
515
516 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
517 LG 1,0(1) # 6 bytes Load address from GOT in r1
518 BCR 15,1 # 2 bytes Jump to address
519 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
520 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
521 BRCL 15,-x # 6 bytes Jump to start of PLT
522 .long ? # 4 bytes offset into symbol table
523
524 Total = 32 bytes per PLT entry
525 Fixup at offset 2: relative address to GOT entry
526 Fixup at offset 22: relative branch to PLT0
527 Fixup at offset 28: 32 bit offset into symbol table
528
529 A 32 bit offset into the symbol table is enough. It allows for symbol
530 tables up to a size of 2 gigabyte. A single dynamic object (the main
531 program, any shared library) is limited to 4GB in size and I want to see
532 the program that manages to have a symbol table of more than 2 GB with a
533 total size of at max 4 GB. */
534
535 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
536 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
537 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
538 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
539 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
540 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
541 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
542 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
543
544 /* The first PLT entry pushes the offset into the symbol table
545 from R1 onto the stack at 8(15) and the loader object info
546 at 12(15), loads the loader address in R1 and jumps to it. */
547
548 /* The first entry in the PLT:
549
550 PLT0:
551 STG 1,56(15) # r1 contains the offset into the symbol table
552 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
553 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
554 LG 1,16(1) # get entry address of loader
555 BCR 15,1 # jump to loader
556
557 Fixup at offset 8: relative address to start of GOT. */
558
559 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
560 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
561 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
562 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
563 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
564 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
565 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
566 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
567
568 /* The s390 linker needs to keep track of the number of relocs that it
569 decides to copy as dynamic relocs in check_relocs for each symbol.
570 This is so that it can later discard them if they are found to be
571 unnecessary. We store the information in a field extending the
572 regular ELF linker hash table. */
573
574 struct elf_s390_dyn_relocs
575 {
576 struct elf_s390_dyn_relocs *next;
577
578 /* The input section of the reloc. */
579 asection *sec;
580
581 /* Total number of relocs copied for the input section. */
582 bfd_size_type count;
583
584 /* Number of pc-relative relocs copied for the input section. */
585 bfd_size_type pc_count;
586 };
587
588 /* s390 ELF linker hash entry. */
589
590 struct elf_s390_link_hash_entry
591 {
592 struct elf_link_hash_entry elf;
593
594 /* Track dynamic relocs copied for this symbol. */
595 struct elf_s390_dyn_relocs *dyn_relocs;
596
597 /* Number of GOTPLT references for a function. */
598 bfd_signed_vma gotplt_refcount;
599
600 #define GOT_UNKNOWN 0
601 #define GOT_NORMAL 1
602 #define GOT_TLS_GD 2
603 #define GOT_TLS_IE 3
604 #define GOT_TLS_IE_NLT 3
605 unsigned char tls_type;
606 };
607
608 #define elf_s390_hash_entry(ent) \
609 ((struct elf_s390_link_hash_entry *)(ent))
610
611 struct elf_s390_obj_tdata
612 {
613 struct elf_obj_tdata root;
614
615 /* tls_type for each local got entry. */
616 char *local_got_tls_type;
617 };
618
619 #define elf_s390_tdata(abfd) \
620 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
621
622 #define elf_s390_local_got_tls_type(abfd) \
623 (elf_s390_tdata (abfd)->local_got_tls_type)
624
625 static bfd_boolean
626 elf_s390_mkobject (bfd *abfd)
627 {
628 if (abfd->tdata.any == NULL)
629 {
630 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
631 abfd->tdata.any = bfd_zalloc (abfd, amt);
632 if (abfd->tdata.any == NULL)
633 return FALSE;
634 }
635 return bfd_elf_mkobject (abfd);
636 }
637
638 static bfd_boolean
639 elf_s390_object_p (abfd)
640 bfd *abfd;
641 {
642 /* Set the right machine number for an s390 elf32 file. */
643 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
644 }
645
646 /* s390 ELF linker hash table. */
647
648 struct elf_s390_link_hash_table
649 {
650 struct elf_link_hash_table elf;
651
652 /* Short-cuts to get to dynamic linker sections. */
653 asection *sgot;
654 asection *sgotplt;
655 asection *srelgot;
656 asection *splt;
657 asection *srelplt;
658 asection *sdynbss;
659 asection *srelbss;
660
661 union {
662 bfd_signed_vma refcount;
663 bfd_vma offset;
664 } tls_ldm_got;
665
666 /* Small local sym to section mapping cache. */
667 struct sym_sec_cache sym_sec;
668 };
669
670 /* Get the s390 ELF linker hash table from a link_info structure. */
671
672 #define elf_s390_hash_table(p) \
673 ((struct elf_s390_link_hash_table *) ((p)->hash))
674
675 /* Create an entry in an s390 ELF linker hash table. */
676
677 static struct bfd_hash_entry *
678 link_hash_newfunc (entry, table, string)
679 struct bfd_hash_entry *entry;
680 struct bfd_hash_table *table;
681 const char *string;
682 {
683 /* Allocate the structure if it has not already been allocated by a
684 subclass. */
685 if (entry == NULL)
686 {
687 entry = bfd_hash_allocate (table,
688 sizeof (struct elf_s390_link_hash_entry));
689 if (entry == NULL)
690 return entry;
691 }
692
693 /* Call the allocation method of the superclass. */
694 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
695 if (entry != NULL)
696 {
697 struct elf_s390_link_hash_entry *eh;
698
699 eh = (struct elf_s390_link_hash_entry *) entry;
700 eh->dyn_relocs = NULL;
701 eh->gotplt_refcount = 0;
702 eh->tls_type = GOT_UNKNOWN;
703 }
704
705 return entry;
706 }
707
708 /* Create an s390 ELF linker hash table. */
709
710 static struct bfd_link_hash_table *
711 elf_s390_link_hash_table_create (abfd)
712 bfd *abfd;
713 {
714 struct elf_s390_link_hash_table *ret;
715 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
716
717 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
718 if (ret == NULL)
719 return NULL;
720
721 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
722 sizeof (struct elf_s390_link_hash_entry)))
723 {
724 free (ret);
725 return NULL;
726 }
727
728 ret->sgot = NULL;
729 ret->sgotplt = NULL;
730 ret->srelgot = NULL;
731 ret->splt = NULL;
732 ret->srelplt = NULL;
733 ret->sdynbss = NULL;
734 ret->srelbss = NULL;
735 ret->tls_ldm_got.refcount = 0;
736 ret->sym_sec.abfd = NULL;
737
738 return &ret->elf.root;
739 }
740
741 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
742 shortcuts to them in our hash table. */
743
744 static bfd_boolean
745 create_got_section (dynobj, info)
746 bfd *dynobj;
747 struct bfd_link_info *info;
748 {
749 struct elf_s390_link_hash_table *htab;
750
751 if (! _bfd_elf_create_got_section (dynobj, info))
752 return FALSE;
753
754 htab = elf_s390_hash_table (info);
755 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
756 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
757 if (!htab->sgot || !htab->sgotplt)
758 abort ();
759
760 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
761 (SEC_ALLOC | SEC_LOAD
762 | SEC_HAS_CONTENTS
763 | SEC_IN_MEMORY
764 | SEC_LINKER_CREATED
765 | SEC_READONLY));
766 if (htab->srelgot == NULL
767 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
768 return FALSE;
769 return TRUE;
770 }
771
772 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
773 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
774 hash table. */
775
776 static bfd_boolean
777 elf_s390_create_dynamic_sections (dynobj, info)
778 bfd *dynobj;
779 struct bfd_link_info *info;
780 {
781 struct elf_s390_link_hash_table *htab;
782
783 htab = elf_s390_hash_table (info);
784 if (!htab->sgot && !create_got_section (dynobj, info))
785 return FALSE;
786
787 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
788 return FALSE;
789
790 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
791 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
792 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
793 if (!info->shared)
794 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
795
796 if (!htab->splt || !htab->srelplt || !htab->sdynbss
797 || (!info->shared && !htab->srelbss))
798 abort ();
799
800 return TRUE;
801 }
802
803 /* Copy the extra info we tack onto an elf_link_hash_entry. */
804
805 static void
806 elf_s390_copy_indirect_symbol (info, dir, ind)
807 struct bfd_link_info *info;
808 struct elf_link_hash_entry *dir, *ind;
809 {
810 struct elf_s390_link_hash_entry *edir, *eind;
811
812 edir = (struct elf_s390_link_hash_entry *) dir;
813 eind = (struct elf_s390_link_hash_entry *) ind;
814
815 if (eind->dyn_relocs != NULL)
816 {
817 if (edir->dyn_relocs != NULL)
818 {
819 struct elf_s390_dyn_relocs **pp;
820 struct elf_s390_dyn_relocs *p;
821
822 /* Add reloc counts against the indirect sym to the direct sym
823 list. Merge any entries against the same section. */
824 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
825 {
826 struct elf_s390_dyn_relocs *q;
827
828 for (q = edir->dyn_relocs; q != NULL; q = q->next)
829 if (q->sec == p->sec)
830 {
831 q->pc_count += p->pc_count;
832 q->count += p->count;
833 *pp = p->next;
834 break;
835 }
836 if (q == NULL)
837 pp = &p->next;
838 }
839 *pp = edir->dyn_relocs;
840 }
841
842 edir->dyn_relocs = eind->dyn_relocs;
843 eind->dyn_relocs = NULL;
844 }
845
846 if (ind->root.type == bfd_link_hash_indirect
847 && dir->got.refcount <= 0)
848 {
849 edir->tls_type = eind->tls_type;
850 eind->tls_type = GOT_UNKNOWN;
851 }
852
853 if (ELIMINATE_COPY_RELOCS
854 && ind->root.type != bfd_link_hash_indirect
855 && dir->dynamic_adjusted)
856 {
857 /* If called to transfer flags for a weakdef during processing
858 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
859 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
860 dir->ref_dynamic |= ind->ref_dynamic;
861 dir->ref_regular |= ind->ref_regular;
862 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
863 dir->needs_plt |= ind->needs_plt;
864 }
865 else
866 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
867 }
868
869 static int
870 elf_s390_tls_transition (info, r_type, is_local)
871 struct bfd_link_info *info;
872 int r_type;
873 int is_local;
874 {
875 if (info->shared)
876 return r_type;
877
878 switch (r_type)
879 {
880 case R_390_TLS_GD64:
881 case R_390_TLS_IE64:
882 if (is_local)
883 return R_390_TLS_LE64;
884 return R_390_TLS_IE64;
885 case R_390_TLS_GOTIE64:
886 if (is_local)
887 return R_390_TLS_LE64;
888 return R_390_TLS_GOTIE64;
889 case R_390_TLS_LDM64:
890 return R_390_TLS_LE64;
891 }
892
893 return r_type;
894 }
895
896 /* Look through the relocs for a section during the first phase, and
897 allocate space in the global offset table or procedure linkage
898 table. */
899
900 static bfd_boolean
901 elf_s390_check_relocs (abfd, info, sec, relocs)
902 bfd *abfd;
903 struct bfd_link_info *info;
904 asection *sec;
905 const Elf_Internal_Rela *relocs;
906 {
907 struct elf_s390_link_hash_table *htab;
908 Elf_Internal_Shdr *symtab_hdr;
909 struct elf_link_hash_entry **sym_hashes;
910 const Elf_Internal_Rela *rel;
911 const Elf_Internal_Rela *rel_end;
912 asection *sreloc;
913 bfd_signed_vma *local_got_refcounts;
914 int tls_type, old_tls_type;
915
916 if (info->relocatable)
917 return TRUE;
918
919 htab = elf_s390_hash_table (info);
920 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
921 sym_hashes = elf_sym_hashes (abfd);
922 local_got_refcounts = elf_local_got_refcounts (abfd);
923
924 sreloc = NULL;
925
926 rel_end = relocs + sec->reloc_count;
927 for (rel = relocs; rel < rel_end; rel++)
928 {
929 unsigned int r_type;
930 unsigned long r_symndx;
931 struct elf_link_hash_entry *h;
932
933 r_symndx = ELF64_R_SYM (rel->r_info);
934
935 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
936 {
937 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
938 abfd,
939 r_symndx);
940 return FALSE;
941 }
942
943 if (r_symndx < symtab_hdr->sh_info)
944 h = NULL;
945 else
946 {
947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
948 while (h->root.type == bfd_link_hash_indirect
949 || h->root.type == bfd_link_hash_warning)
950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
951 }
952
953 /* Create got section and local_got_refcounts array if they
954 are needed. */
955 r_type = elf_s390_tls_transition (info,
956 ELF64_R_TYPE (rel->r_info),
957 h == NULL);
958 switch (r_type)
959 {
960 case R_390_GOT12:
961 case R_390_GOT16:
962 case R_390_GOT20:
963 case R_390_GOT32:
964 case R_390_GOT64:
965 case R_390_GOTENT:
966 case R_390_GOTPLT12:
967 case R_390_GOTPLT16:
968 case R_390_GOTPLT20:
969 case R_390_GOTPLT32:
970 case R_390_GOTPLT64:
971 case R_390_GOTPLTENT:
972 case R_390_TLS_GD64:
973 case R_390_TLS_GOTIE12:
974 case R_390_TLS_GOTIE20:
975 case R_390_TLS_GOTIE64:
976 case R_390_TLS_IEENT:
977 case R_390_TLS_IE64:
978 case R_390_TLS_LDM64:
979 if (h == NULL
980 && local_got_refcounts == NULL)
981 {
982 bfd_size_type size;
983
984 size = symtab_hdr->sh_info;
985 size *= (sizeof (bfd_signed_vma) + sizeof(char));
986 local_got_refcounts = ((bfd_signed_vma *)
987 bfd_zalloc (abfd, size));
988 if (local_got_refcounts == NULL)
989 return FALSE;
990 elf_local_got_refcounts (abfd) = local_got_refcounts;
991 elf_s390_local_got_tls_type (abfd)
992 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
993 }
994 /* Fall through. */
995 case R_390_GOTOFF16:
996 case R_390_GOTOFF32:
997 case R_390_GOTOFF64:
998 case R_390_GOTPC:
999 case R_390_GOTPCDBL:
1000 if (htab->sgot == NULL)
1001 {
1002 if (htab->elf.dynobj == NULL)
1003 htab->elf.dynobj = abfd;
1004 if (!create_got_section (htab->elf.dynobj, info))
1005 return FALSE;
1006 }
1007 }
1008
1009 switch (r_type)
1010 {
1011 case R_390_GOTOFF16:
1012 case R_390_GOTOFF32:
1013 case R_390_GOTOFF64:
1014 case R_390_GOTPC:
1015 case R_390_GOTPCDBL:
1016 /* Got is created, nothing to be done. */
1017 break;
1018
1019 case R_390_PLT16DBL:
1020 case R_390_PLT32:
1021 case R_390_PLT32DBL:
1022 case R_390_PLT64:
1023 case R_390_PLTOFF16:
1024 case R_390_PLTOFF32:
1025 case R_390_PLTOFF64:
1026 /* This symbol requires a procedure linkage table entry. We
1027 actually build the entry in adjust_dynamic_symbol,
1028 because this might be a case of linking PIC code which is
1029 never referenced by a dynamic object, in which case we
1030 don't need to generate a procedure linkage table entry
1031 after all. */
1032
1033 /* If this is a local symbol, we resolve it directly without
1034 creating a procedure linkage table entry. */
1035 if (h != NULL)
1036 {
1037 h->needs_plt = 1;
1038 h->plt.refcount += 1;
1039 }
1040 break;
1041
1042 case R_390_GOTPLT12:
1043 case R_390_GOTPLT16:
1044 case R_390_GOTPLT20:
1045 case R_390_GOTPLT32:
1046 case R_390_GOTPLT64:
1047 case R_390_GOTPLTENT:
1048 /* This symbol requires either a procedure linkage table entry
1049 or an entry in the local got. We actually build the entry
1050 in adjust_dynamic_symbol because whether this is really a
1051 global reference can change and with it the fact if we have
1052 to create a plt entry or a local got entry. To be able to
1053 make a once global symbol a local one we have to keep track
1054 of the number of gotplt references that exist for this
1055 symbol. */
1056 if (h != NULL)
1057 {
1058 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1059 h->needs_plt = 1;
1060 h->plt.refcount += 1;
1061 }
1062 else
1063 local_got_refcounts[r_symndx] += 1;
1064 break;
1065
1066 case R_390_TLS_LDM64:
1067 htab->tls_ldm_got.refcount += 1;
1068 break;
1069
1070 case R_390_TLS_IE64:
1071 case R_390_TLS_GOTIE12:
1072 case R_390_TLS_GOTIE20:
1073 case R_390_TLS_GOTIE64:
1074 case R_390_TLS_IEENT:
1075 if (info->shared)
1076 info->flags |= DF_STATIC_TLS;
1077 /* Fall through */
1078
1079 case R_390_GOT12:
1080 case R_390_GOT16:
1081 case R_390_GOT20:
1082 case R_390_GOT32:
1083 case R_390_GOT64:
1084 case R_390_GOTENT:
1085 case R_390_TLS_GD64:
1086 /* This symbol requires a global offset table entry. */
1087 switch (r_type)
1088 {
1089 default:
1090 case R_390_GOT12:
1091 case R_390_GOT16:
1092 case R_390_GOT20:
1093 case R_390_GOT32:
1094 case R_390_GOTENT:
1095 tls_type = GOT_NORMAL;
1096 break;
1097 case R_390_TLS_GD64:
1098 tls_type = GOT_TLS_GD;
1099 break;
1100 case R_390_TLS_IE64:
1101 case R_390_TLS_GOTIE64:
1102 tls_type = GOT_TLS_IE;
1103 break;
1104 case R_390_TLS_GOTIE12:
1105 case R_390_TLS_GOTIE20:
1106 case R_390_TLS_IEENT:
1107 tls_type = GOT_TLS_IE_NLT;
1108 break;
1109 }
1110
1111 if (h != NULL)
1112 {
1113 h->got.refcount += 1;
1114 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1115 }
1116 else
1117 {
1118 local_got_refcounts[r_symndx] += 1;
1119 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1120 }
1121 /* If a TLS symbol is accessed using IE at least once,
1122 there is no point to use dynamic model for it. */
1123 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1124 {
1125 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1126 {
1127 (*_bfd_error_handler)
1128 (_("%B: `%s' accessed both as normal and thread local symbol"),
1129 abfd, h->root.root.string);
1130 return FALSE;
1131 }
1132 if (old_tls_type > tls_type)
1133 tls_type = old_tls_type;
1134 }
1135
1136 if (old_tls_type != tls_type)
1137 {
1138 if (h != NULL)
1139 elf_s390_hash_entry (h)->tls_type = tls_type;
1140 else
1141 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1142 }
1143
1144 if (r_type != R_390_TLS_IE64)
1145 break;
1146 /* Fall through */
1147
1148 case R_390_TLS_LE64:
1149 if (!info->shared)
1150 break;
1151 info->flags |= DF_STATIC_TLS;
1152 /* Fall through */
1153
1154 case R_390_8:
1155 case R_390_16:
1156 case R_390_32:
1157 case R_390_64:
1158 case R_390_PC16:
1159 case R_390_PC16DBL:
1160 case R_390_PC32:
1161 case R_390_PC32DBL:
1162 case R_390_PC64:
1163 if (h != NULL && !info->shared)
1164 {
1165 /* If this reloc is in a read-only section, we might
1166 need a copy reloc. We can't check reliably at this
1167 stage whether the section is read-only, as input
1168 sections have not yet been mapped to output sections.
1169 Tentatively set the flag for now, and correct in
1170 adjust_dynamic_symbol. */
1171 h->non_got_ref = 1;
1172
1173 /* We may need a .plt entry if the function this reloc
1174 refers to is in a shared lib. */
1175 h->plt.refcount += 1;
1176 }
1177
1178 /* If we are creating a shared library, and this is a reloc
1179 against a global symbol, or a non PC relative reloc
1180 against a local symbol, then we need to copy the reloc
1181 into the shared library. However, if we are linking with
1182 -Bsymbolic, we do not need to copy a reloc against a
1183 global symbol which is defined in an object we are
1184 including in the link (i.e., DEF_REGULAR is set). At
1185 this point we have not seen all the input files, so it is
1186 possible that DEF_REGULAR is not set now but will be set
1187 later (it is never cleared). In case of a weak definition,
1188 DEF_REGULAR may be cleared later by a strong definition in
1189 a shared library. We account for that possibility below by
1190 storing information in the relocs_copied field of the hash
1191 table entry. A similar situation occurs when creating
1192 shared libraries and symbol visibility changes render the
1193 symbol local.
1194
1195 If on the other hand, we are creating an executable, we
1196 may need to keep relocations for symbols satisfied by a
1197 dynamic library if we manage to avoid copy relocs for the
1198 symbol. */
1199 if ((info->shared
1200 && (sec->flags & SEC_ALLOC) != 0
1201 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1204 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1206 || (h != NULL
1207 && (! info->symbolic
1208 || h->root.type == bfd_link_hash_defweak
1209 || !h->def_regular))))
1210 || (ELIMINATE_COPY_RELOCS
1211 && !info->shared
1212 && (sec->flags & SEC_ALLOC) != 0
1213 && h != NULL
1214 && (h->root.type == bfd_link_hash_defweak
1215 || !h->def_regular)))
1216 {
1217 struct elf_s390_dyn_relocs *p;
1218 struct elf_s390_dyn_relocs **head;
1219
1220 /* We must copy these reloc types into the output file.
1221 Create a reloc section in dynobj and make room for
1222 this reloc. */
1223 if (sreloc == NULL)
1224 {
1225 const char *name;
1226 bfd *dynobj;
1227
1228 name = (bfd_elf_string_from_elf_section
1229 (abfd,
1230 elf_elfheader (abfd)->e_shstrndx,
1231 elf_section_data (sec)->rel_hdr.sh_name));
1232 if (name == NULL)
1233 return FALSE;
1234
1235 if (! CONST_STRNEQ (name, ".rela")
1236 || strcmp (bfd_get_section_name (abfd, sec),
1237 name + 5) != 0)
1238 {
1239 (*_bfd_error_handler)
1240 (_("%B: bad relocation section name `%s\'"),
1241 abfd, name);
1242 }
1243
1244 if (htab->elf.dynobj == NULL)
1245 htab->elf.dynobj = abfd;
1246
1247 dynobj = htab->elf.dynobj;
1248 sreloc = bfd_get_section_by_name (dynobj, name);
1249 if (sreloc == NULL)
1250 {
1251 flagword flags;
1252
1253 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1254 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1255 if ((sec->flags & SEC_ALLOC) != 0)
1256 flags |= SEC_ALLOC | SEC_LOAD;
1257 sreloc = bfd_make_section_with_flags (dynobj,
1258 name,
1259 flags);
1260 if (sreloc == NULL
1261 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1262 return FALSE;
1263 }
1264 elf_section_data (sec)->sreloc = sreloc;
1265 }
1266
1267 /* If this is a global symbol, we count the number of
1268 relocations we need for this symbol. */
1269 if (h != NULL)
1270 {
1271 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1272 }
1273 else
1274 {
1275 /* Track dynamic relocs needed for local syms too.
1276 We really need local syms available to do this
1277 easily. Oh well. */
1278
1279 asection *s;
1280 void *vpp;
1281
1282 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1283 sec, r_symndx);
1284 if (s == NULL)
1285 return FALSE;
1286
1287 vpp = &elf_section_data (s)->local_dynrel;
1288 head = (struct elf_s390_dyn_relocs **) vpp;
1289 }
1290
1291 p = *head;
1292 if (p == NULL || p->sec != sec)
1293 {
1294 bfd_size_type amt = sizeof *p;
1295 p = ((struct elf_s390_dyn_relocs *)
1296 bfd_alloc (htab->elf.dynobj, amt));
1297 if (p == NULL)
1298 return FALSE;
1299 p->next = *head;
1300 *head = p;
1301 p->sec = sec;
1302 p->count = 0;
1303 p->pc_count = 0;
1304 }
1305
1306 p->count += 1;
1307 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1308 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1309 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1310 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1311 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1312 p->pc_count += 1;
1313 }
1314 break;
1315
1316 /* This relocation describes the C++ object vtable hierarchy.
1317 Reconstruct it for later use during GC. */
1318 case R_390_GNU_VTINHERIT:
1319 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1320 return FALSE;
1321 break;
1322
1323 /* This relocation describes which C++ vtable entries are actually
1324 used. Record for later use during GC. */
1325 case R_390_GNU_VTENTRY:
1326 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1327 return FALSE;
1328 break;
1329
1330 default:
1331 break;
1332 }
1333 }
1334
1335 return TRUE;
1336 }
1337
1338 /* Return the section that should be marked against GC for a given
1339 relocation. */
1340
1341 static asection *
1342 elf_s390_gc_mark_hook (asection *sec,
1343 struct bfd_link_info *info,
1344 Elf_Internal_Rela *rel,
1345 struct elf_link_hash_entry *h,
1346 Elf_Internal_Sym *sym)
1347 {
1348 if (h != NULL)
1349 switch (ELF64_R_TYPE (rel->r_info))
1350 {
1351 case R_390_GNU_VTINHERIT:
1352 case R_390_GNU_VTENTRY:
1353 return NULL;
1354 }
1355
1356 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1357 }
1358
1359 /* Update the got entry reference counts for the section being removed. */
1360
1361 static bfd_boolean
1362 elf_s390_gc_sweep_hook (bfd *abfd,
1363 struct bfd_link_info *info,
1364 asection *sec,
1365 const Elf_Internal_Rela *relocs)
1366 {
1367 Elf_Internal_Shdr *symtab_hdr;
1368 struct elf_link_hash_entry **sym_hashes;
1369 bfd_signed_vma *local_got_refcounts;
1370 const Elf_Internal_Rela *rel, *relend;
1371
1372 elf_section_data (sec)->local_dynrel = NULL;
1373
1374 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1375 sym_hashes = elf_sym_hashes (abfd);
1376 local_got_refcounts = elf_local_got_refcounts (abfd);
1377
1378 relend = relocs + sec->reloc_count;
1379 for (rel = relocs; rel < relend; rel++)
1380 {
1381 unsigned long r_symndx;
1382 unsigned int r_type;
1383 struct elf_link_hash_entry *h = NULL;
1384
1385 r_symndx = ELF64_R_SYM (rel->r_info);
1386 if (r_symndx >= symtab_hdr->sh_info)
1387 {
1388 struct elf_s390_link_hash_entry *eh;
1389 struct elf_s390_dyn_relocs **pp;
1390 struct elf_s390_dyn_relocs *p;
1391
1392 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1393 while (h->root.type == bfd_link_hash_indirect
1394 || h->root.type == bfd_link_hash_warning)
1395 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1396 eh = (struct elf_s390_link_hash_entry *) h;
1397
1398 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1399 if (p->sec == sec)
1400 {
1401 /* Everything must go for SEC. */
1402 *pp = p->next;
1403 break;
1404 }
1405 }
1406
1407 r_type = ELF64_R_TYPE (rel->r_info);
1408 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1409 switch (r_type)
1410 {
1411 case R_390_TLS_LDM64:
1412 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1413 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1414 break;
1415
1416 case R_390_TLS_GD64:
1417 case R_390_TLS_IE64:
1418 case R_390_TLS_GOTIE12:
1419 case R_390_TLS_GOTIE20:
1420 case R_390_TLS_GOTIE64:
1421 case R_390_TLS_IEENT:
1422 case R_390_GOT12:
1423 case R_390_GOT16:
1424 case R_390_GOT20:
1425 case R_390_GOT32:
1426 case R_390_GOT64:
1427 case R_390_GOTOFF16:
1428 case R_390_GOTOFF32:
1429 case R_390_GOTOFF64:
1430 case R_390_GOTPC:
1431 case R_390_GOTPCDBL:
1432 case R_390_GOTENT:
1433 if (h != NULL)
1434 {
1435 if (h->got.refcount > 0)
1436 h->got.refcount -= 1;
1437 }
1438 else if (local_got_refcounts != NULL)
1439 {
1440 if (local_got_refcounts[r_symndx] > 0)
1441 local_got_refcounts[r_symndx] -= 1;
1442 }
1443 break;
1444
1445 case R_390_8:
1446 case R_390_12:
1447 case R_390_16:
1448 case R_390_20:
1449 case R_390_32:
1450 case R_390_64:
1451 case R_390_PC16:
1452 case R_390_PC16DBL:
1453 case R_390_PC32:
1454 case R_390_PC32DBL:
1455 case R_390_PC64:
1456 if (info->shared)
1457 break;
1458 /* Fall through */
1459
1460 case R_390_PLT16DBL:
1461 case R_390_PLT32:
1462 case R_390_PLT32DBL:
1463 case R_390_PLT64:
1464 case R_390_PLTOFF16:
1465 case R_390_PLTOFF32:
1466 case R_390_PLTOFF64:
1467 if (h != NULL)
1468 {
1469 if (h->plt.refcount > 0)
1470 h->plt.refcount -= 1;
1471 }
1472 break;
1473
1474 case R_390_GOTPLT12:
1475 case R_390_GOTPLT16:
1476 case R_390_GOTPLT20:
1477 case R_390_GOTPLT32:
1478 case R_390_GOTPLT64:
1479 case R_390_GOTPLTENT:
1480 if (h != NULL)
1481 {
1482 if (h->plt.refcount > 0)
1483 {
1484 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1485 h->plt.refcount -= 1;
1486 }
1487 }
1488 else if (local_got_refcounts != NULL)
1489 {
1490 if (local_got_refcounts[r_symndx] > 0)
1491 local_got_refcounts[r_symndx] -= 1;
1492 }
1493 break;
1494
1495 default:
1496 break;
1497 }
1498 }
1499
1500 return TRUE;
1501 }
1502
1503 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1504 entry but we found we will not create any. Called when we find we will
1505 not have any PLT for this symbol, by for example
1506 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1507 or elf_s390_size_dynamic_sections if no dynamic sections will be
1508 created (we're only linking static objects). */
1509
1510 static void
1511 elf_s390_adjust_gotplt (h)
1512 struct elf_s390_link_hash_entry *h;
1513 {
1514 if (h->elf.root.type == bfd_link_hash_warning)
1515 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1516
1517 if (h->gotplt_refcount <= 0)
1518 return;
1519
1520 /* We simply add the number of gotplt references to the number
1521 * of got references for this symbol. */
1522 h->elf.got.refcount += h->gotplt_refcount;
1523 h->gotplt_refcount = -1;
1524 }
1525
1526 /* Adjust a symbol defined by a dynamic object and referenced by a
1527 regular object. The current definition is in some section of the
1528 dynamic object, but we're not including those sections. We have to
1529 change the definition to something the rest of the link can
1530 understand. */
1531
1532 static bfd_boolean
1533 elf_s390_adjust_dynamic_symbol (info, h)
1534 struct bfd_link_info *info;
1535 struct elf_link_hash_entry *h;
1536 {
1537 struct elf_s390_link_hash_table *htab;
1538 asection *s;
1539 unsigned int power_of_two;
1540
1541 /* If this is a function, put it in the procedure linkage table. We
1542 will fill in the contents of the procedure linkage table later
1543 (although we could actually do it here). */
1544 if (h->type == STT_FUNC
1545 || h->needs_plt)
1546 {
1547 if (h->plt.refcount <= 0
1548 || (! info->shared
1549 && !h->def_dynamic
1550 && !h->ref_dynamic
1551 && h->root.type != bfd_link_hash_undefweak
1552 && h->root.type != bfd_link_hash_undefined))
1553 {
1554 /* This case can occur if we saw a PLT32 reloc in an input
1555 file, but the symbol was never referred to by a dynamic
1556 object, or if all references were garbage collected. In
1557 such a case, we don't actually need to build a procedure
1558 linkage table, and we can just do a PC32 reloc instead. */
1559 h->plt.offset = (bfd_vma) -1;
1560 h->needs_plt = 0;
1561 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1562 }
1563
1564 return TRUE;
1565 }
1566 else
1567 /* It's possible that we incorrectly decided a .plt reloc was
1568 needed for an R_390_PC32 reloc to a non-function sym in
1569 check_relocs. We can't decide accurately between function and
1570 non-function syms in check-relocs; Objects loaded later in
1571 the link may change h->type. So fix it now. */
1572 h->plt.offset = (bfd_vma) -1;
1573
1574 /* If this is a weak symbol, and there is a real definition, the
1575 processor independent code will have arranged for us to see the
1576 real definition first, and we can just use the same value. */
1577 if (h->u.weakdef != NULL)
1578 {
1579 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1580 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1581 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1582 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1583 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1584 h->non_got_ref = h->u.weakdef->non_got_ref;
1585 return TRUE;
1586 }
1587
1588 /* This is a reference to a symbol defined by a dynamic object which
1589 is not a function. */
1590
1591 /* If we are creating a shared library, we must presume that the
1592 only references to the symbol are via the global offset table.
1593 For such cases we need not do anything here; the relocations will
1594 be handled correctly by relocate_section. */
1595 if (info->shared)
1596 return TRUE;
1597
1598 /* If there are no references to this symbol that do not use the
1599 GOT, we don't need to generate a copy reloc. */
1600 if (!h->non_got_ref)
1601 return TRUE;
1602
1603 /* If -z nocopyreloc was given, we won't generate them either. */
1604 if (info->nocopyreloc)
1605 {
1606 h->non_got_ref = 0;
1607 return TRUE;
1608 }
1609
1610 if (ELIMINATE_COPY_RELOCS)
1611 {
1612 struct elf_s390_link_hash_entry * eh;
1613 struct elf_s390_dyn_relocs *p;
1614
1615 eh = (struct elf_s390_link_hash_entry *) h;
1616 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1617 {
1618 s = p->sec->output_section;
1619 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1620 break;
1621 }
1622
1623 /* If we didn't find any dynamic relocs in read-only sections, then
1624 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1625 if (p == NULL)
1626 {
1627 h->non_got_ref = 0;
1628 return TRUE;
1629 }
1630 }
1631
1632 if (h->size == 0)
1633 {
1634 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1635 h->root.root.string);
1636 return TRUE;
1637 }
1638
1639 /* We must allocate the symbol in our .dynbss section, which will
1640 become part of the .bss section of the executable. There will be
1641 an entry for this symbol in the .dynsym section. The dynamic
1642 object will contain position independent code, so all references
1643 from the dynamic object to this symbol will go through the global
1644 offset table. The dynamic linker will use the .dynsym entry to
1645 determine the address it must put in the global offset table, so
1646 both the dynamic object and the regular object will refer to the
1647 same memory location for the variable. */
1648
1649 htab = elf_s390_hash_table (info);
1650
1651 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1652 copy the initial value out of the dynamic object and into the
1653 runtime process image. */
1654 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1655 {
1656 htab->srelbss->size += sizeof (Elf64_External_Rela);
1657 h->needs_copy = 1;
1658 }
1659
1660 /* We need to figure out the alignment required for this symbol. I
1661 have no idea how ELF linkers handle this. */
1662 power_of_two = bfd_log2 (h->size);
1663 if (power_of_two > 3)
1664 power_of_two = 3;
1665
1666 /* Apply the required alignment. */
1667 s = htab->sdynbss;
1668 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1669 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1670 {
1671 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1672 return FALSE;
1673 }
1674
1675 /* Define the symbol as being at this point in the section. */
1676 h->root.u.def.section = s;
1677 h->root.u.def.value = s->size;
1678
1679 /* Increment the section size to make room for the symbol. */
1680 s->size += h->size;
1681
1682 return TRUE;
1683 }
1684
1685 /* Allocate space in .plt, .got and associated reloc sections for
1686 dynamic relocs. */
1687
1688 static bfd_boolean
1689 allocate_dynrelocs (h, inf)
1690 struct elf_link_hash_entry *h;
1691 PTR inf;
1692 {
1693 struct bfd_link_info *info;
1694 struct elf_s390_link_hash_table *htab;
1695 struct elf_s390_link_hash_entry *eh;
1696 struct elf_s390_dyn_relocs *p;
1697
1698 if (h->root.type == bfd_link_hash_indirect)
1699 return TRUE;
1700
1701 if (h->root.type == bfd_link_hash_warning)
1702 /* When warning symbols are created, they **replace** the "real"
1703 entry in the hash table, thus we never get to see the real
1704 symbol in a hash traversal. So look at it now. */
1705 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1706
1707 info = (struct bfd_link_info *) inf;
1708 htab = elf_s390_hash_table (info);
1709
1710 if (htab->elf.dynamic_sections_created
1711 && h->plt.refcount > 0
1712 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1713 || h->root.type != bfd_link_hash_undefweak))
1714 {
1715 /* Make sure this symbol is output as a dynamic symbol.
1716 Undefined weak syms won't yet be marked as dynamic. */
1717 if (h->dynindx == -1
1718 && !h->forced_local)
1719 {
1720 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1721 return FALSE;
1722 }
1723
1724 if (info->shared
1725 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1726 {
1727 asection *s = htab->splt;
1728
1729 /* If this is the first .plt entry, make room for the special
1730 first entry. */
1731 if (s->size == 0)
1732 s->size += PLT_FIRST_ENTRY_SIZE;
1733
1734 h->plt.offset = s->size;
1735
1736 /* If this symbol is not defined in a regular file, and we are
1737 not generating a shared library, then set the symbol to this
1738 location in the .plt. This is required to make function
1739 pointers compare as equal between the normal executable and
1740 the shared library. */
1741 if (! info->shared
1742 && !h->def_regular)
1743 {
1744 h->root.u.def.section = s;
1745 h->root.u.def.value = h->plt.offset;
1746 }
1747
1748 /* Make room for this entry. */
1749 s->size += PLT_ENTRY_SIZE;
1750
1751 /* We also need to make an entry in the .got.plt section, which
1752 will be placed in the .got section by the linker script. */
1753 htab->sgotplt->size += GOT_ENTRY_SIZE;
1754
1755 /* We also need to make an entry in the .rela.plt section. */
1756 htab->srelplt->size += sizeof (Elf64_External_Rela);
1757 }
1758 else
1759 {
1760 h->plt.offset = (bfd_vma) -1;
1761 h->needs_plt = 0;
1762 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1763 }
1764 }
1765 else
1766 {
1767 h->plt.offset = (bfd_vma) -1;
1768 h->needs_plt = 0;
1769 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1770 }
1771
1772 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1773 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1774 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1775 we can save the dynamic TLS relocation. */
1776 if (h->got.refcount > 0
1777 && !info->shared
1778 && h->dynindx == -1
1779 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1780 {
1781 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1782 /* For the GOTIE access without a literal pool entry the offset has
1783 to be stored somewhere. The immediate value in the instruction
1784 is not bit enough so the value is stored in the got. */
1785 {
1786 h->got.offset = htab->sgot->size;
1787 htab->sgot->size += GOT_ENTRY_SIZE;
1788 }
1789 else
1790 h->got.offset = (bfd_vma) -1;
1791 }
1792 else if (h->got.refcount > 0)
1793 {
1794 asection *s;
1795 bfd_boolean dyn;
1796 int tls_type = elf_s390_hash_entry(h)->tls_type;
1797
1798 /* Make sure this symbol is output as a dynamic symbol.
1799 Undefined weak syms won't yet be marked as dynamic. */
1800 if (h->dynindx == -1
1801 && !h->forced_local)
1802 {
1803 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1804 return FALSE;
1805 }
1806
1807 s = htab->sgot;
1808 h->got.offset = s->size;
1809 s->size += GOT_ENTRY_SIZE;
1810 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1811 if (tls_type == GOT_TLS_GD)
1812 s->size += GOT_ENTRY_SIZE;
1813 dyn = htab->elf.dynamic_sections_created;
1814 /* R_390_TLS_IE64 needs one dynamic relocation,
1815 R_390_TLS_GD64 needs one if local symbol and two if global. */
1816 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1817 || tls_type >= GOT_TLS_IE)
1818 htab->srelgot->size += sizeof (Elf64_External_Rela);
1819 else if (tls_type == GOT_TLS_GD)
1820 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1821 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1822 || h->root.type != bfd_link_hash_undefweak)
1823 && (info->shared
1824 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1825 htab->srelgot->size += sizeof (Elf64_External_Rela);
1826 }
1827 else
1828 h->got.offset = (bfd_vma) -1;
1829
1830 eh = (struct elf_s390_link_hash_entry *) h;
1831 if (eh->dyn_relocs == NULL)
1832 return TRUE;
1833
1834 /* In the shared -Bsymbolic case, discard space allocated for
1835 dynamic pc-relative relocs against symbols which turn out to be
1836 defined in regular objects. For the normal shared case, discard
1837 space for pc-relative relocs that have become local due to symbol
1838 visibility changes. */
1839
1840 if (info->shared)
1841 {
1842 if (SYMBOL_REFERENCES_LOCAL (info, h))
1843 {
1844 struct elf_s390_dyn_relocs **pp;
1845
1846 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1847 {
1848 p->count -= p->pc_count;
1849 p->pc_count = 0;
1850 if (p->count == 0)
1851 *pp = p->next;
1852 else
1853 pp = &p->next;
1854 }
1855 }
1856
1857 /* Also discard relocs on undefined weak syms with non-default
1858 visibility. */
1859 if (eh->dyn_relocs != NULL
1860 && h->root.type == bfd_link_hash_undefweak)
1861 {
1862 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1863 eh->dyn_relocs = NULL;
1864
1865 /* Make sure undefined weak symbols are output as a dynamic
1866 symbol in PIEs. */
1867 else if (h->dynindx == -1
1868 && !h->forced_local)
1869 {
1870 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1871 return FALSE;
1872 }
1873 }
1874 }
1875 else if (ELIMINATE_COPY_RELOCS)
1876 {
1877 /* For the non-shared case, discard space for relocs against
1878 symbols which turn out to need copy relocs or are not
1879 dynamic. */
1880
1881 if (!h->non_got_ref
1882 && ((h->def_dynamic
1883 && !h->def_regular)
1884 || (htab->elf.dynamic_sections_created
1885 && (h->root.type == bfd_link_hash_undefweak
1886 || h->root.type == bfd_link_hash_undefined))))
1887 {
1888 /* Make sure this symbol is output as a dynamic symbol.
1889 Undefined weak syms won't yet be marked as dynamic. */
1890 if (h->dynindx == -1
1891 && !h->forced_local)
1892 {
1893 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1894 return FALSE;
1895 }
1896
1897 /* If that succeeded, we know we'll be keeping all the
1898 relocs. */
1899 if (h->dynindx != -1)
1900 goto keep;
1901 }
1902
1903 eh->dyn_relocs = NULL;
1904
1905 keep: ;
1906 }
1907
1908 /* Finally, allocate space. */
1909 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1910 {
1911 asection *sreloc = elf_section_data (p->sec)->sreloc;
1912 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1913 }
1914
1915 return TRUE;
1916 }
1917
1918 /* Find any dynamic relocs that apply to read-only sections. */
1919
1920 static bfd_boolean
1921 readonly_dynrelocs (h, inf)
1922 struct elf_link_hash_entry *h;
1923 PTR inf;
1924 {
1925 struct elf_s390_link_hash_entry *eh;
1926 struct elf_s390_dyn_relocs *p;
1927
1928 if (h->root.type == bfd_link_hash_warning)
1929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1930
1931 eh = (struct elf_s390_link_hash_entry *) h;
1932 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1933 {
1934 asection *s = p->sec->output_section;
1935
1936 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1937 {
1938 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1939
1940 info->flags |= DF_TEXTREL;
1941
1942 /* Not an error, just cut short the traversal. */
1943 return FALSE;
1944 }
1945 }
1946 return TRUE;
1947 }
1948
1949 /* Set the sizes of the dynamic sections. */
1950
1951 static bfd_boolean
1952 elf_s390_size_dynamic_sections (output_bfd, info)
1953 bfd *output_bfd ATTRIBUTE_UNUSED;
1954 struct bfd_link_info *info;
1955 {
1956 struct elf_s390_link_hash_table *htab;
1957 bfd *dynobj;
1958 asection *s;
1959 bfd_boolean relocs;
1960 bfd *ibfd;
1961
1962 htab = elf_s390_hash_table (info);
1963 dynobj = htab->elf.dynobj;
1964 if (dynobj == NULL)
1965 abort ();
1966
1967 if (htab->elf.dynamic_sections_created)
1968 {
1969 /* Set the contents of the .interp section to the interpreter. */
1970 if (info->executable)
1971 {
1972 s = bfd_get_section_by_name (dynobj, ".interp");
1973 if (s == NULL)
1974 abort ();
1975 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1976 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1977 }
1978 }
1979
1980 /* Set up .got offsets for local syms, and space for local dynamic
1981 relocs. */
1982 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1983 {
1984 bfd_signed_vma *local_got;
1985 bfd_signed_vma *end_local_got;
1986 char *local_tls_type;
1987 bfd_size_type locsymcount;
1988 Elf_Internal_Shdr *symtab_hdr;
1989 asection *srela;
1990
1991 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1992 continue;
1993
1994 for (s = ibfd->sections; s != NULL; s = s->next)
1995 {
1996 struct elf_s390_dyn_relocs *p;
1997
1998 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1999 {
2000 if (!bfd_is_abs_section (p->sec)
2001 && bfd_is_abs_section (p->sec->output_section))
2002 {
2003 /* Input section has been discarded, either because
2004 it is a copy of a linkonce section or due to
2005 linker script /DISCARD/, so we'll be discarding
2006 the relocs too. */
2007 }
2008 else if (p->count != 0)
2009 {
2010 srela = elf_section_data (p->sec)->sreloc;
2011 srela->size += p->count * sizeof (Elf64_External_Rela);
2012 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2013 info->flags |= DF_TEXTREL;
2014 }
2015 }
2016 }
2017
2018 local_got = elf_local_got_refcounts (ibfd);
2019 if (!local_got)
2020 continue;
2021
2022 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2023 locsymcount = symtab_hdr->sh_info;
2024 end_local_got = local_got + locsymcount;
2025 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2026 s = htab->sgot;
2027 srela = htab->srelgot;
2028 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2029 {
2030 if (*local_got > 0)
2031 {
2032 *local_got = s->size;
2033 s->size += GOT_ENTRY_SIZE;
2034 if (*local_tls_type == GOT_TLS_GD)
2035 s->size += GOT_ENTRY_SIZE;
2036 if (info->shared)
2037 srela->size += sizeof (Elf64_External_Rela);
2038 }
2039 else
2040 *local_got = (bfd_vma) -1;
2041 }
2042 }
2043
2044 if (htab->tls_ldm_got.refcount > 0)
2045 {
2046 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2047 relocs. */
2048 htab->tls_ldm_got.offset = htab->sgot->size;
2049 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2050 htab->srelgot->size += sizeof (Elf64_External_Rela);
2051 }
2052 else
2053 htab->tls_ldm_got.offset = -1;
2054
2055 /* Allocate global sym .plt and .got entries, and space for global
2056 sym dynamic relocs. */
2057 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2058
2059 /* We now have determined the sizes of the various dynamic sections.
2060 Allocate memory for them. */
2061 relocs = FALSE;
2062 for (s = dynobj->sections; s != NULL; s = s->next)
2063 {
2064 if ((s->flags & SEC_LINKER_CREATED) == 0)
2065 continue;
2066
2067 if (s == htab->splt
2068 || s == htab->sgot
2069 || s == htab->sgotplt
2070 || s == htab->sdynbss)
2071 {
2072 /* Strip this section if we don't need it; see the
2073 comment below. */
2074 }
2075 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2076 {
2077 if (s->size != 0 && s != htab->srelplt)
2078 relocs = TRUE;
2079
2080 /* We use the reloc_count field as a counter if we need
2081 to copy relocs into the output file. */
2082 s->reloc_count = 0;
2083 }
2084 else
2085 {
2086 /* It's not one of our sections, so don't allocate space. */
2087 continue;
2088 }
2089
2090 if (s->size == 0)
2091 {
2092 /* If we don't need this section, strip it from the
2093 output file. This is to handle .rela.bss and
2094 .rela.plt. We must create it in
2095 create_dynamic_sections, because it must be created
2096 before the linker maps input sections to output
2097 sections. The linker does that before
2098 adjust_dynamic_symbol is called, and it is that
2099 function which decides whether anything needs to go
2100 into these sections. */
2101
2102 s->flags |= SEC_EXCLUDE;
2103 continue;
2104 }
2105
2106 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2107 continue;
2108
2109 /* Allocate memory for the section contents. We use bfd_zalloc
2110 here in case unused entries are not reclaimed before the
2111 section's contents are written out. This should not happen,
2112 but this way if it does, we get a R_390_NONE reloc instead
2113 of garbage. */
2114 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2115 if (s->contents == NULL)
2116 return FALSE;
2117 }
2118
2119 if (htab->elf.dynamic_sections_created)
2120 {
2121 /* Add some entries to the .dynamic section. We fill in the
2122 values later, in elf_s390_finish_dynamic_sections, but we
2123 must add the entries now so that we get the correct size for
2124 the .dynamic section. The DT_DEBUG entry is filled in by the
2125 dynamic linker and used by the debugger. */
2126 #define add_dynamic_entry(TAG, VAL) \
2127 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2128
2129 if (info->executable)
2130 {
2131 if (!add_dynamic_entry (DT_DEBUG, 0))
2132 return FALSE;
2133 }
2134
2135 if (htab->splt->size != 0)
2136 {
2137 if (!add_dynamic_entry (DT_PLTGOT, 0)
2138 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2139 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2140 || !add_dynamic_entry (DT_JMPREL, 0))
2141 return FALSE;
2142 }
2143
2144 if (relocs)
2145 {
2146 if (!add_dynamic_entry (DT_RELA, 0)
2147 || !add_dynamic_entry (DT_RELASZ, 0)
2148 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2149 return FALSE;
2150
2151 /* If any dynamic relocs apply to a read-only section,
2152 then we need a DT_TEXTREL entry. */
2153 if ((info->flags & DF_TEXTREL) == 0)
2154 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2155 (PTR) info);
2156
2157 if ((info->flags & DF_TEXTREL) != 0)
2158 {
2159 if (!add_dynamic_entry (DT_TEXTREL, 0))
2160 return FALSE;
2161 }
2162 }
2163 }
2164 #undef add_dynamic_entry
2165
2166 return TRUE;
2167 }
2168
2169 /* Return the base VMA address which should be subtracted from real addresses
2170 when resolving @dtpoff relocation.
2171 This is PT_TLS segment p_vaddr. */
2172
2173 static bfd_vma
2174 dtpoff_base (info)
2175 struct bfd_link_info *info;
2176 {
2177 /* If tls_sec is NULL, we should have signalled an error already. */
2178 if (elf_hash_table (info)->tls_sec == NULL)
2179 return 0;
2180 return elf_hash_table (info)->tls_sec->vma;
2181 }
2182
2183 /* Return the relocation value for @tpoff relocation
2184 if STT_TLS virtual address is ADDRESS. */
2185
2186 static bfd_vma
2187 tpoff (info, address)
2188 struct bfd_link_info *info;
2189 bfd_vma address;
2190 {
2191 struct elf_link_hash_table *htab = elf_hash_table (info);
2192
2193 /* If tls_sec is NULL, we should have signalled an error already. */
2194 if (htab->tls_sec == NULL)
2195 return 0;
2196 return htab->tls_size + htab->tls_sec->vma - address;
2197 }
2198
2199 /* Complain if TLS instruction relocation is against an invalid
2200 instruction. */
2201
2202 static void
2203 invalid_tls_insn (input_bfd, input_section, rel)
2204 bfd *input_bfd;
2205 asection *input_section;
2206 Elf_Internal_Rela *rel;
2207 {
2208 reloc_howto_type *howto;
2209
2210 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2211 (*_bfd_error_handler)
2212 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2213 input_bfd,
2214 input_section,
2215 (long) rel->r_offset,
2216 howto->name);
2217 bfd_set_error (bfd_error_bad_value);
2218 }
2219
2220 /* Relocate a 390 ELF section. */
2221
2222 static bfd_boolean
2223 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2224 contents, relocs, local_syms, local_sections)
2225 bfd *output_bfd;
2226 struct bfd_link_info *info;
2227 bfd *input_bfd;
2228 asection *input_section;
2229 bfd_byte *contents;
2230 Elf_Internal_Rela *relocs;
2231 Elf_Internal_Sym *local_syms;
2232 asection **local_sections;
2233 {
2234 struct elf_s390_link_hash_table *htab;
2235 Elf_Internal_Shdr *symtab_hdr;
2236 struct elf_link_hash_entry **sym_hashes;
2237 bfd_vma *local_got_offsets;
2238 Elf_Internal_Rela *rel;
2239 Elf_Internal_Rela *relend;
2240
2241 if (info->relocatable)
2242 return TRUE;
2243
2244 htab = elf_s390_hash_table (info);
2245 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2246 sym_hashes = elf_sym_hashes (input_bfd);
2247 local_got_offsets = elf_local_got_offsets (input_bfd);
2248
2249 rel = relocs;
2250 relend = relocs + input_section->reloc_count;
2251 for (; rel < relend; rel++)
2252 {
2253 unsigned int r_type;
2254 reloc_howto_type *howto;
2255 unsigned long r_symndx;
2256 struct elf_link_hash_entry *h;
2257 Elf_Internal_Sym *sym;
2258 asection *sec;
2259 bfd_vma off;
2260 bfd_vma relocation;
2261 bfd_boolean unresolved_reloc;
2262 bfd_reloc_status_type r;
2263 int tls_type;
2264
2265 r_type = ELF64_R_TYPE (rel->r_info);
2266 if (r_type == (int) R_390_GNU_VTINHERIT
2267 || r_type == (int) R_390_GNU_VTENTRY)
2268 continue;
2269 if (r_type >= (int) R_390_max)
2270 {
2271 bfd_set_error (bfd_error_bad_value);
2272 return FALSE;
2273 }
2274
2275 howto = elf_howto_table + r_type;
2276 r_symndx = ELF64_R_SYM (rel->r_info);
2277
2278 /* This is a final link. */
2279 h = NULL;
2280 sym = NULL;
2281 sec = NULL;
2282 unresolved_reloc = FALSE;
2283 if (r_symndx < symtab_hdr->sh_info)
2284 {
2285 sym = local_syms + r_symndx;
2286 sec = local_sections[r_symndx];
2287 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2288 }
2289 else
2290 {
2291 bfd_boolean warned ATTRIBUTE_UNUSED;
2292
2293 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2294 r_symndx, symtab_hdr, sym_hashes,
2295 h, sec, relocation,
2296 unresolved_reloc, warned);
2297 }
2298
2299 switch (r_type)
2300 {
2301 case R_390_GOTPLT12:
2302 case R_390_GOTPLT16:
2303 case R_390_GOTPLT20:
2304 case R_390_GOTPLT32:
2305 case R_390_GOTPLT64:
2306 case R_390_GOTPLTENT:
2307 /* There are three cases for a GOTPLT relocation. 1) The
2308 relocation is against the jump slot entry of a plt that
2309 will get emitted to the output file. 2) The relocation
2310 is against the jump slot of a plt entry that has been
2311 removed. elf_s390_adjust_gotplt has created a GOT entry
2312 as replacement. 3) The relocation is against a local symbol.
2313 Cases 2) and 3) are the same as the GOT relocation code
2314 so we just have to test for case 1 and fall through for
2315 the other two. */
2316 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2317 {
2318 bfd_vma plt_index;
2319
2320 /* Calc. index no.
2321 Current offset - size first entry / entry size. */
2322 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2323 PLT_ENTRY_SIZE;
2324
2325 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2326 addr & GOT addr. */
2327 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2328 unresolved_reloc = FALSE;
2329
2330 if (r_type == R_390_GOTPLTENT)
2331 relocation += htab->sgot->output_section->vma;
2332 break;
2333 }
2334 /* Fall through. */
2335
2336 case R_390_GOT12:
2337 case R_390_GOT16:
2338 case R_390_GOT20:
2339 case R_390_GOT32:
2340 case R_390_GOT64:
2341 case R_390_GOTENT:
2342 /* Relocation is to the entry for this symbol in the global
2343 offset table. */
2344 if (htab->sgot == NULL)
2345 abort ();
2346
2347 if (h != NULL)
2348 {
2349 bfd_boolean dyn;
2350
2351 off = h->got.offset;
2352 dyn = htab->elf.dynamic_sections_created;
2353 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2354 || (info->shared
2355 && (info->symbolic
2356 || h->dynindx == -1
2357 || h->forced_local)
2358 && h->def_regular)
2359 || (ELF_ST_VISIBILITY (h->other)
2360 && h->root.type == bfd_link_hash_undefweak))
2361 {
2362 /* This is actually a static link, or it is a
2363 -Bsymbolic link and the symbol is defined
2364 locally, or the symbol was forced to be local
2365 because of a version file. We must initialize
2366 this entry in the global offset table. Since the
2367 offset must always be a multiple of 2, we use the
2368 least significant bit to record whether we have
2369 initialized it already.
2370
2371 When doing a dynamic link, we create a .rel.got
2372 relocation entry to initialize the value. This
2373 is done in the finish_dynamic_symbol routine. */
2374 if ((off & 1) != 0)
2375 off &= ~1;
2376 else
2377 {
2378 bfd_put_64 (output_bfd, relocation,
2379 htab->sgot->contents + off);
2380 h->got.offset |= 1;
2381 }
2382 }
2383 else
2384 unresolved_reloc = FALSE;
2385 }
2386 else
2387 {
2388 if (local_got_offsets == NULL)
2389 abort ();
2390
2391 off = local_got_offsets[r_symndx];
2392
2393 /* The offset must always be a multiple of 8. We use
2394 the least significant bit to record whether we have
2395 already generated the necessary reloc. */
2396 if ((off & 1) != 0)
2397 off &= ~1;
2398 else
2399 {
2400 bfd_put_64 (output_bfd, relocation,
2401 htab->sgot->contents + off);
2402
2403 if (info->shared)
2404 {
2405 asection *s;
2406 Elf_Internal_Rela outrel;
2407 bfd_byte *loc;
2408
2409 s = htab->srelgot;
2410 if (s == NULL)
2411 abort ();
2412
2413 outrel.r_offset = (htab->sgot->output_section->vma
2414 + htab->sgot->output_offset
2415 + off);
2416 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2417 outrel.r_addend = relocation;
2418 loc = s->contents;
2419 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2420 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2421 }
2422
2423 local_got_offsets[r_symndx] |= 1;
2424 }
2425 }
2426
2427 if (off >= (bfd_vma) -2)
2428 abort ();
2429
2430 relocation = htab->sgot->output_offset + off;
2431
2432 /* For @GOTENT the relocation is against the offset between
2433 the instruction and the symbols entry in the GOT and not
2434 between the start of the GOT and the symbols entry. We
2435 add the vma of the GOT to get the correct value. */
2436 if ( r_type == R_390_GOTENT
2437 || r_type == R_390_GOTPLTENT)
2438 relocation += htab->sgot->output_section->vma;
2439
2440 break;
2441
2442 case R_390_GOTOFF16:
2443 case R_390_GOTOFF32:
2444 case R_390_GOTOFF64:
2445 /* Relocation is relative to the start of the global offset
2446 table. */
2447
2448 /* Note that sgot->output_offset is not involved in this
2449 calculation. We always want the start of .got. If we
2450 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2451 permitted by the ABI, we might have to change this
2452 calculation. */
2453 relocation -= htab->sgot->output_section->vma;
2454 break;
2455
2456 case R_390_GOTPC:
2457 case R_390_GOTPCDBL:
2458 /* Use global offset table as symbol value. */
2459 relocation = htab->sgot->output_section->vma;
2460 unresolved_reloc = FALSE;
2461 break;
2462
2463 case R_390_PLT16DBL:
2464 case R_390_PLT32:
2465 case R_390_PLT32DBL:
2466 case R_390_PLT64:
2467 /* Relocation is to the entry for this symbol in the
2468 procedure linkage table. */
2469
2470 /* Resolve a PLT32 reloc against a local symbol directly,
2471 without using the procedure linkage table. */
2472 if (h == NULL)
2473 break;
2474
2475 if (h->plt.offset == (bfd_vma) -1
2476 || htab->splt == NULL)
2477 {
2478 /* We didn't make a PLT entry for this symbol. This
2479 happens when statically linking PIC code, or when
2480 using -Bsymbolic. */
2481 break;
2482 }
2483
2484 relocation = (htab->splt->output_section->vma
2485 + htab->splt->output_offset
2486 + h->plt.offset);
2487 unresolved_reloc = FALSE;
2488 break;
2489
2490 case R_390_PLTOFF16:
2491 case R_390_PLTOFF32:
2492 case R_390_PLTOFF64:
2493 /* Relocation is to the entry for this symbol in the
2494 procedure linkage table relative to the start of the GOT. */
2495
2496 /* For local symbols or if we didn't make a PLT entry for
2497 this symbol resolve the symbol directly. */
2498 if ( h == NULL
2499 || h->plt.offset == (bfd_vma) -1
2500 || htab->splt == NULL)
2501 {
2502 relocation -= htab->sgot->output_section->vma;
2503 break;
2504 }
2505
2506 relocation = (htab->splt->output_section->vma
2507 + htab->splt->output_offset
2508 + h->plt.offset
2509 - htab->sgot->output_section->vma);
2510 unresolved_reloc = FALSE;
2511 break;
2512
2513 case R_390_8:
2514 case R_390_16:
2515 case R_390_32:
2516 case R_390_64:
2517 case R_390_PC16:
2518 case R_390_PC16DBL:
2519 case R_390_PC32:
2520 case R_390_PC32DBL:
2521 case R_390_PC64:
2522 /* r_symndx will be zero only for relocs against symbols
2523 from removed linkonce sections, or sections discarded by
2524 a linker script. */
2525 if (r_symndx == 0
2526 || (input_section->flags & SEC_ALLOC) == 0)
2527 break;
2528
2529 if ((info->shared
2530 && (h == NULL
2531 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2532 || h->root.type != bfd_link_hash_undefweak)
2533 && ((r_type != R_390_PC16
2534 && r_type != R_390_PC16DBL
2535 && r_type != R_390_PC32
2536 && r_type != R_390_PC32DBL
2537 && r_type != R_390_PC64)
2538 || (h != NULL
2539 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2540 || (ELIMINATE_COPY_RELOCS
2541 && !info->shared
2542 && h != NULL
2543 && h->dynindx != -1
2544 && !h->non_got_ref
2545 && ((h->def_dynamic
2546 && !h->def_regular)
2547 || h->root.type == bfd_link_hash_undefweak
2548 || h->root.type == bfd_link_hash_undefined)))
2549 {
2550 Elf_Internal_Rela outrel;
2551 bfd_boolean skip, relocate;
2552 asection *sreloc;
2553 bfd_byte *loc;
2554
2555 /* When generating a shared object, these relocations
2556 are copied into the output file to be resolved at run
2557 time. */
2558 skip = FALSE;
2559 relocate = FALSE;
2560
2561 outrel.r_offset =
2562 _bfd_elf_section_offset (output_bfd, info, input_section,
2563 rel->r_offset);
2564 if (outrel.r_offset == (bfd_vma) -1)
2565 skip = TRUE;
2566 else if (outrel.r_offset == (bfd_vma) -2)
2567 skip = TRUE, relocate = TRUE;
2568
2569 outrel.r_offset += (input_section->output_section->vma
2570 + input_section->output_offset);
2571
2572 if (skip)
2573 memset (&outrel, 0, sizeof outrel);
2574 else if (h != NULL
2575 && h->dynindx != -1
2576 && (r_type == R_390_PC16
2577 || r_type == R_390_PC16DBL
2578 || r_type == R_390_PC32
2579 || r_type == R_390_PC32DBL
2580 || r_type == R_390_PC64
2581 || !info->shared
2582 || !info->symbolic
2583 || !h->def_regular))
2584 {
2585 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2586 outrel.r_addend = rel->r_addend;
2587 }
2588 else
2589 {
2590 /* This symbol is local, or marked to become local. */
2591 outrel.r_addend = relocation + rel->r_addend;
2592 if (r_type == R_390_64)
2593 {
2594 relocate = TRUE;
2595 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2596 }
2597 else
2598 {
2599 long sindx;
2600
2601 if (bfd_is_abs_section (sec))
2602 sindx = 0;
2603 else if (sec == NULL || sec->owner == NULL)
2604 {
2605 bfd_set_error(bfd_error_bad_value);
2606 return FALSE;
2607 }
2608 else
2609 {
2610 asection *osec;
2611
2612 osec = sec->output_section;
2613 sindx = elf_section_data (osec)->dynindx;
2614 BFD_ASSERT (sindx > 0);
2615
2616 /* We are turning this relocation into one
2617 against a section symbol, so subtract out
2618 the output section's address but not the
2619 offset of the input section in the output
2620 section. */
2621
2622 outrel.r_addend -= osec->vma;
2623 }
2624 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2625 }
2626 }
2627
2628 sreloc = elf_section_data (input_section)->sreloc;
2629 if (sreloc == NULL)
2630 abort ();
2631
2632 loc = sreloc->contents;
2633 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2634 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2635
2636 /* If this reloc is against an external symbol, we do
2637 not want to fiddle with the addend. Otherwise, we
2638 need to include the symbol value so that it becomes
2639 an addend for the dynamic reloc. */
2640 if (! relocate)
2641 continue;
2642 }
2643
2644 break;
2645
2646 /* Relocations for tls literal pool entries. */
2647 case R_390_TLS_IE64:
2648 if (info->shared)
2649 {
2650 Elf_Internal_Rela outrel;
2651 asection *sreloc;
2652 bfd_byte *loc;
2653
2654 outrel.r_offset = rel->r_offset
2655 + input_section->output_section->vma
2656 + input_section->output_offset;
2657 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2658 sreloc = elf_section_data (input_section)->sreloc;
2659 if (sreloc == NULL)
2660 abort ();
2661 loc = sreloc->contents;
2662 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2663 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2664 }
2665 /* Fall through. */
2666
2667 case R_390_TLS_GD64:
2668 case R_390_TLS_GOTIE64:
2669 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2670 tls_type = GOT_UNKNOWN;
2671 if (h == NULL && local_got_offsets)
2672 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2673 else if (h != NULL)
2674 {
2675 tls_type = elf_s390_hash_entry(h)->tls_type;
2676 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2677 r_type = R_390_TLS_LE64;
2678 }
2679 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2680 r_type = R_390_TLS_IE64;
2681
2682 if (r_type == R_390_TLS_LE64)
2683 {
2684 /* This relocation gets optimized away by the local exec
2685 access optimization. */
2686 BFD_ASSERT (! unresolved_reloc);
2687 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2688 contents + rel->r_offset);
2689 continue;
2690 }
2691
2692 if (htab->sgot == NULL)
2693 abort ();
2694
2695 if (h != NULL)
2696 off = h->got.offset;
2697 else
2698 {
2699 if (local_got_offsets == NULL)
2700 abort ();
2701
2702 off = local_got_offsets[r_symndx];
2703 }
2704
2705 emit_tls_relocs:
2706
2707 if ((off & 1) != 0)
2708 off &= ~1;
2709 else
2710 {
2711 Elf_Internal_Rela outrel;
2712 bfd_byte *loc;
2713 int dr_type, indx;
2714
2715 if (htab->srelgot == NULL)
2716 abort ();
2717
2718 outrel.r_offset = (htab->sgot->output_section->vma
2719 + htab->sgot->output_offset + off);
2720
2721 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2722 if (r_type == R_390_TLS_GD64)
2723 dr_type = R_390_TLS_DTPMOD;
2724 else
2725 dr_type = R_390_TLS_TPOFF;
2726 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2727 outrel.r_addend = relocation - dtpoff_base (info);
2728 else
2729 outrel.r_addend = 0;
2730 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2731 loc = htab->srelgot->contents;
2732 loc += htab->srelgot->reloc_count++
2733 * sizeof (Elf64_External_Rela);
2734 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2735
2736 if (r_type == R_390_TLS_GD64)
2737 {
2738 if (indx == 0)
2739 {
2740 BFD_ASSERT (! unresolved_reloc);
2741 bfd_put_64 (output_bfd,
2742 relocation - dtpoff_base (info),
2743 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2744 }
2745 else
2746 {
2747 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2748 outrel.r_offset += GOT_ENTRY_SIZE;
2749 outrel.r_addend = 0;
2750 htab->srelgot->reloc_count++;
2751 loc += sizeof (Elf64_External_Rela);
2752 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2753 }
2754 }
2755
2756 if (h != NULL)
2757 h->got.offset |= 1;
2758 else
2759 local_got_offsets[r_symndx] |= 1;
2760 }
2761
2762 if (off >= (bfd_vma) -2)
2763 abort ();
2764 if (r_type == ELF64_R_TYPE (rel->r_info))
2765 {
2766 relocation = htab->sgot->output_offset + off;
2767 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2768 relocation += htab->sgot->output_section->vma;
2769 unresolved_reloc = FALSE;
2770 }
2771 else
2772 {
2773 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2774 contents + rel->r_offset);
2775 continue;
2776 }
2777 break;
2778
2779 case R_390_TLS_GOTIE12:
2780 case R_390_TLS_GOTIE20:
2781 case R_390_TLS_IEENT:
2782 if (h == NULL)
2783 {
2784 if (local_got_offsets == NULL)
2785 abort();
2786 off = local_got_offsets[r_symndx];
2787 if (info->shared)
2788 goto emit_tls_relocs;
2789 }
2790 else
2791 {
2792 off = h->got.offset;
2793 tls_type = elf_s390_hash_entry(h)->tls_type;
2794 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2795 goto emit_tls_relocs;
2796 }
2797
2798 if (htab->sgot == NULL)
2799 abort ();
2800
2801 BFD_ASSERT (! unresolved_reloc);
2802 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2803 htab->sgot->contents + off);
2804 relocation = htab->sgot->output_offset + off;
2805 if (r_type == R_390_TLS_IEENT)
2806 relocation += htab->sgot->output_section->vma;
2807 unresolved_reloc = FALSE;
2808 break;
2809
2810 case R_390_TLS_LDM64:
2811 if (! info->shared)
2812 /* The literal pool entry this relocation refers to gets ignored
2813 by the optimized code of the local exec model. Do nothing
2814 and the value will turn out zero. */
2815 continue;
2816
2817 if (htab->sgot == NULL)
2818 abort ();
2819
2820 off = htab->tls_ldm_got.offset;
2821 if (off & 1)
2822 off &= ~1;
2823 else
2824 {
2825 Elf_Internal_Rela outrel;
2826 bfd_byte *loc;
2827
2828 if (htab->srelgot == NULL)
2829 abort ();
2830
2831 outrel.r_offset = (htab->sgot->output_section->vma
2832 + htab->sgot->output_offset + off);
2833
2834 bfd_put_64 (output_bfd, 0,
2835 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2836 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2837 outrel.r_addend = 0;
2838 loc = htab->srelgot->contents;
2839 loc += htab->srelgot->reloc_count++
2840 * sizeof (Elf64_External_Rela);
2841 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2842 htab->tls_ldm_got.offset |= 1;
2843 }
2844 relocation = htab->sgot->output_offset + off;
2845 unresolved_reloc = FALSE;
2846 break;
2847
2848 case R_390_TLS_LE64:
2849 if (info->shared)
2850 {
2851 /* Linking a shared library with non-fpic code requires
2852 a R_390_TLS_TPOFF relocation. */
2853 Elf_Internal_Rela outrel;
2854 asection *sreloc;
2855 bfd_byte *loc;
2856 int indx;
2857
2858 outrel.r_offset = rel->r_offset
2859 + input_section->output_section->vma
2860 + input_section->output_offset;
2861 if (h != NULL && h->dynindx != -1)
2862 indx = h->dynindx;
2863 else
2864 indx = 0;
2865 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2866 if (indx == 0)
2867 outrel.r_addend = relocation - dtpoff_base (info);
2868 else
2869 outrel.r_addend = 0;
2870 sreloc = elf_section_data (input_section)->sreloc;
2871 if (sreloc == NULL)
2872 abort ();
2873 loc = sreloc->contents;
2874 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2875 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2876 }
2877 else
2878 {
2879 BFD_ASSERT (! unresolved_reloc);
2880 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2881 contents + rel->r_offset);
2882 }
2883 continue;
2884
2885 case R_390_TLS_LDO64:
2886 if (info->shared)
2887 relocation -= dtpoff_base (info);
2888 else
2889 /* When converting LDO to LE, we must negate. */
2890 relocation = -tpoff (info, relocation);
2891 break;
2892
2893 /* Relocations for tls instructions. */
2894 case R_390_TLS_LOAD:
2895 case R_390_TLS_GDCALL:
2896 case R_390_TLS_LDCALL:
2897 tls_type = GOT_UNKNOWN;
2898 if (h == NULL && local_got_offsets)
2899 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2900 else if (h != NULL)
2901 tls_type = elf_s390_hash_entry(h)->tls_type;
2902
2903 if (tls_type == GOT_TLS_GD)
2904 continue;
2905
2906 if (r_type == R_390_TLS_LOAD)
2907 {
2908 if (!info->shared && (h == NULL || h->dynindx == -1))
2909 {
2910 /* IE->LE transition. Four valid cases:
2911 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2912 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2913 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2914 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2915 unsigned int insn0, insn1, ry;
2916
2917 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2918 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2919 if (insn1 != 0x0004)
2920 invalid_tls_insn (input_bfd, input_section, rel);
2921 ry = 0;
2922 if ((insn0 & 0xff00f000) == 0xe3000000)
2923 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2924 ry = (insn0 & 0x000f0000);
2925 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2926 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2927 ry = (insn0 & 0x0000f000) << 4;
2928 else if ((insn0 & 0xff00f000) == 0xe300c000)
2929 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2930 ry = (insn0 & 0x000f0000);
2931 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2932 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2933 ry = (insn0 & 0x0000f000) << 4;
2934 else
2935 invalid_tls_insn (input_bfd, input_section, rel);
2936 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2937 insn1 = 0x000d;
2938 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2939 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2940 }
2941 }
2942 else if (r_type == R_390_TLS_GDCALL)
2943 {
2944 unsigned int insn0, insn1;
2945
2946 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2947 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2948 if ((insn0 & 0xffff0000) != 0xc0e50000)
2949 invalid_tls_insn (input_bfd, input_section, rel);
2950 if (!info->shared && (h == NULL || h->dynindx == -1))
2951 {
2952 /* GD->LE transition.
2953 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2954 insn0 = 0xc0040000;
2955 insn1 = 0x0000;
2956 }
2957 else
2958 {
2959 /* GD->IE transition.
2960 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2961 insn0 = 0xe322c000;
2962 insn1 = 0x0004;
2963 }
2964 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2965 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2966 }
2967 else if (r_type == R_390_TLS_LDCALL)
2968 {
2969 if (!info->shared)
2970 {
2971 unsigned int insn0, insn1;
2972
2973 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2974 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2975 if ((insn0 & 0xffff0000) != 0xc0e50000)
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977 /* LD->LE transition.
2978 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2979 insn0 = 0xc0040000;
2980 insn1 = 0x0000;
2981 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2982 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2983 }
2984 }
2985 continue;
2986
2987 default:
2988 break;
2989 }
2990
2991 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2992 because such sections are not SEC_ALLOC and thus ld.so will
2993 not process them. */
2994 if (unresolved_reloc
2995 && !((input_section->flags & SEC_DEBUGGING) != 0
2996 && h->def_dynamic))
2997 (*_bfd_error_handler)
2998 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2999 input_bfd,
3000 input_section,
3001 (long) rel->r_offset,
3002 howto->name,
3003 h->root.root.string);
3004
3005 if (r_type == R_390_20
3006 || r_type == R_390_GOT20
3007 || r_type == R_390_GOTPLT20
3008 || r_type == R_390_TLS_GOTIE20)
3009 {
3010 relocation += rel->r_addend;
3011 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3012 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3013 contents, rel->r_offset,
3014 relocation, 0);
3015 }
3016 else
3017 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3018 contents, rel->r_offset,
3019 relocation, rel->r_addend);
3020
3021 if (r != bfd_reloc_ok)
3022 {
3023 const char *name;
3024
3025 if (h != NULL)
3026 name = h->root.root.string;
3027 else
3028 {
3029 name = bfd_elf_string_from_elf_section (input_bfd,
3030 symtab_hdr->sh_link,
3031 sym->st_name);
3032 if (name == NULL)
3033 return FALSE;
3034 if (*name == '\0')
3035 name = bfd_section_name (input_bfd, sec);
3036 }
3037
3038 if (r == bfd_reloc_overflow)
3039 {
3040
3041 if (! ((*info->callbacks->reloc_overflow)
3042 (info, (h ? &h->root : NULL), name, howto->name,
3043 (bfd_vma) 0, input_bfd, input_section,
3044 rel->r_offset)))
3045 return FALSE;
3046 }
3047 else
3048 {
3049 (*_bfd_error_handler)
3050 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3051 input_bfd, input_section,
3052 (long) rel->r_offset, name, (int) r);
3053 return FALSE;
3054 }
3055 }
3056 }
3057
3058 return TRUE;
3059 }
3060
3061 /* Finish up dynamic symbol handling. We set the contents of various
3062 dynamic sections here. */
3063
3064 static bfd_boolean
3065 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3066 bfd *output_bfd;
3067 struct bfd_link_info *info;
3068 struct elf_link_hash_entry *h;
3069 Elf_Internal_Sym *sym;
3070 {
3071 struct elf_s390_link_hash_table *htab;
3072
3073 htab = elf_s390_hash_table (info);
3074
3075 if (h->plt.offset != (bfd_vma) -1)
3076 {
3077 bfd_vma plt_index;
3078 bfd_vma got_offset;
3079 Elf_Internal_Rela rela;
3080 bfd_byte *loc;
3081
3082 /* This symbol has an entry in the procedure linkage table. Set
3083 it up. */
3084
3085 if (h->dynindx == -1
3086 || htab->splt == NULL
3087 || htab->sgotplt == NULL
3088 || htab->srelplt == NULL)
3089 abort ();
3090
3091 /* Calc. index no.
3092 Current offset - size first entry / entry size. */
3093 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3094
3095 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3096 addr & GOT addr. */
3097 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3098
3099 /* Fill in the blueprint of a PLT. */
3100 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3101 htab->splt->contents + h->plt.offset);
3102 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3103 htab->splt->contents + h->plt.offset + 4);
3104 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3105 htab->splt->contents + h->plt.offset + 8);
3106 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3107 htab->splt->contents + h->plt.offset + 12);
3108 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3109 htab->splt->contents + h->plt.offset + 16);
3110 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3111 htab->splt->contents + h->plt.offset + 20);
3112 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3113 htab->splt->contents + h->plt.offset + 24);
3114 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3115 htab->splt->contents + h->plt.offset + 28);
3116 /* Fixup the relative address to the GOT entry */
3117 bfd_put_32 (output_bfd,
3118 (htab->sgotplt->output_section->vma +
3119 htab->sgotplt->output_offset + got_offset
3120 - (htab->splt->output_section->vma + h->plt.offset))/2,
3121 htab->splt->contents + h->plt.offset + 2);
3122 /* Fixup the relative branch to PLT 0 */
3123 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3124 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3125 htab->splt->contents + h->plt.offset + 24);
3126 /* Fixup offset into symbol table */
3127 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3128 htab->splt->contents + h->plt.offset + 28);
3129
3130 /* Fill in the entry in the global offset table.
3131 Points to instruction after GOT offset. */
3132 bfd_put_64 (output_bfd,
3133 (htab->splt->output_section->vma
3134 + htab->splt->output_offset
3135 + h->plt.offset
3136 + 14),
3137 htab->sgotplt->contents + got_offset);
3138
3139 /* Fill in the entry in the .rela.plt section. */
3140 rela.r_offset = (htab->sgotplt->output_section->vma
3141 + htab->sgotplt->output_offset
3142 + got_offset);
3143 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3144 rela.r_addend = 0;
3145 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3146 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3147
3148 if (!h->def_regular)
3149 {
3150 /* Mark the symbol as undefined, rather than as defined in
3151 the .plt section. Leave the value alone. This is a clue
3152 for the dynamic linker, to make function pointer
3153 comparisons work between an application and shared
3154 library. */
3155 sym->st_shndx = SHN_UNDEF;
3156 }
3157 }
3158
3159 if (h->got.offset != (bfd_vma) -1
3160 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3161 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3162 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3163 {
3164 Elf_Internal_Rela rela;
3165 bfd_byte *loc;
3166
3167 /* This symbol has an entry in the global offset table. Set it
3168 up. */
3169 if (htab->sgot == NULL || htab->srelgot == NULL)
3170 abort ();
3171
3172 rela.r_offset = (htab->sgot->output_section->vma
3173 + htab->sgot->output_offset
3174 + (h->got.offset &~ (bfd_vma) 1));
3175
3176 /* If this is a static link, or it is a -Bsymbolic link and the
3177 symbol is defined locally or was forced to be local because
3178 of a version file, we just want to emit a RELATIVE reloc.
3179 The entry in the global offset table will already have been
3180 initialized in the relocate_section function. */
3181 if (info->shared
3182 && (info->symbolic
3183 || h->dynindx == -1
3184 || h->forced_local)
3185 && h->def_regular)
3186 {
3187 BFD_ASSERT((h->got.offset & 1) != 0);
3188 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3189 rela.r_addend = (h->root.u.def.value
3190 + h->root.u.def.section->output_section->vma
3191 + h->root.u.def.section->output_offset);
3192 }
3193 else
3194 {
3195 BFD_ASSERT((h->got.offset & 1) == 0);
3196 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3197 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3198 rela.r_addend = 0;
3199 }
3200
3201 loc = htab->srelgot->contents;
3202 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3203 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3204 }
3205
3206 if (h->needs_copy)
3207 {
3208 Elf_Internal_Rela rela;
3209 bfd_byte *loc;
3210
3211 /* This symbols needs a copy reloc. Set it up. */
3212
3213 if (h->dynindx == -1
3214 || (h->root.type != bfd_link_hash_defined
3215 && h->root.type != bfd_link_hash_defweak)
3216 || htab->srelbss == NULL)
3217 abort ();
3218
3219 rela.r_offset = (h->root.u.def.value
3220 + h->root.u.def.section->output_section->vma
3221 + h->root.u.def.section->output_offset);
3222 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3223 rela.r_addend = 0;
3224 loc = htab->srelbss->contents;
3225 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3226 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3227 }
3228
3229 /* Mark some specially defined symbols as absolute. */
3230 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3231 || h == htab->elf.hgot
3232 || h == htab->elf.hplt)
3233 sym->st_shndx = SHN_ABS;
3234
3235 return TRUE;
3236 }
3237
3238 /* Used to decide how to sort relocs in an optimal manner for the
3239 dynamic linker, before writing them out. */
3240
3241 static enum elf_reloc_type_class
3242 elf_s390_reloc_type_class (rela)
3243 const Elf_Internal_Rela *rela;
3244 {
3245 switch ((int) ELF64_R_TYPE (rela->r_info))
3246 {
3247 case R_390_RELATIVE:
3248 return reloc_class_relative;
3249 case R_390_JMP_SLOT:
3250 return reloc_class_plt;
3251 case R_390_COPY:
3252 return reloc_class_copy;
3253 default:
3254 return reloc_class_normal;
3255 }
3256 }
3257
3258 /* Finish up the dynamic sections. */
3259
3260 static bfd_boolean
3261 elf_s390_finish_dynamic_sections (output_bfd, info)
3262 bfd *output_bfd;
3263 struct bfd_link_info *info;
3264 {
3265 struct elf_s390_link_hash_table *htab;
3266 bfd *dynobj;
3267 asection *sdyn;
3268
3269 htab = elf_s390_hash_table (info);
3270 dynobj = htab->elf.dynobj;
3271 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3272
3273 if (htab->elf.dynamic_sections_created)
3274 {
3275 Elf64_External_Dyn *dyncon, *dynconend;
3276
3277 if (sdyn == NULL || htab->sgot == NULL)
3278 abort ();
3279
3280 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3281 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3282 for (; dyncon < dynconend; dyncon++)
3283 {
3284 Elf_Internal_Dyn dyn;
3285 asection *s;
3286
3287 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3288
3289 switch (dyn.d_tag)
3290 {
3291 default:
3292 continue;
3293
3294 case DT_PLTGOT:
3295 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3296 break;
3297
3298 case DT_JMPREL:
3299 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3300 break;
3301
3302 case DT_PLTRELSZ:
3303 s = htab->srelplt->output_section;
3304 dyn.d_un.d_val = s->size;
3305 break;
3306
3307 case DT_RELASZ:
3308 /* The procedure linkage table relocs (DT_JMPREL) should
3309 not be included in the overall relocs (DT_RELA).
3310 Therefore, we override the DT_RELASZ entry here to
3311 make it not include the JMPREL relocs. Since the
3312 linker script arranges for .rela.plt to follow all
3313 other relocation sections, we don't have to worry
3314 about changing the DT_RELA entry. */
3315 s = htab->srelplt->output_section;
3316 dyn.d_un.d_val -= s->size;
3317 break;
3318 }
3319
3320 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3321 }
3322
3323 /* Fill in the special first entry in the procedure linkage table. */
3324 if (htab->splt && htab->splt->size > 0)
3325 {
3326 /* fill in blueprint for plt 0 entry */
3327 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3328 htab->splt->contents );
3329 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3330 htab->splt->contents +4 );
3331 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3332 htab->splt->contents +12 );
3333 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3334 htab->splt->contents +16 );
3335 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3336 htab->splt->contents +20 );
3337 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3338 htab->splt->contents + 24);
3339 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3340 htab->splt->contents + 28 );
3341 /* Fixup relative address to start of GOT */
3342 bfd_put_32 (output_bfd,
3343 (htab->sgotplt->output_section->vma +
3344 htab->sgotplt->output_offset
3345 - htab->splt->output_section->vma - 6)/2,
3346 htab->splt->contents + 8);
3347 }
3348 elf_section_data (htab->splt->output_section)
3349 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3350 }
3351
3352 if (htab->sgotplt)
3353 {
3354 /* Fill in the first three entries in the global offset table. */
3355 if (htab->sgotplt->size > 0)
3356 {
3357 bfd_put_64 (output_bfd,
3358 (sdyn == NULL ? (bfd_vma) 0
3359 : sdyn->output_section->vma + sdyn->output_offset),
3360 htab->sgotplt->contents);
3361 /* One entry for shared object struct ptr. */
3362 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3363 /* One entry for _dl_runtime_resolve. */
3364 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3365 }
3366
3367 elf_section_data (htab->sgot->output_section)
3368 ->this_hdr.sh_entsize = 8;
3369 }
3370 return TRUE;
3371 }
3372
3373 /* Return address for Ith PLT stub in section PLT, for relocation REL
3374 or (bfd_vma) -1 if it should not be included. */
3375
3376 static bfd_vma
3377 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3378 const arelent *rel ATTRIBUTE_UNUSED)
3379 {
3380 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3381 }
3382
3383
3384 /* Why was the hash table entry size definition changed from
3385 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3386 this is the only reason for the s390_elf64_size_info structure. */
3387
3388 const struct elf_size_info s390_elf64_size_info =
3389 {
3390 sizeof (Elf64_External_Ehdr),
3391 sizeof (Elf64_External_Phdr),
3392 sizeof (Elf64_External_Shdr),
3393 sizeof (Elf64_External_Rel),
3394 sizeof (Elf64_External_Rela),
3395 sizeof (Elf64_External_Sym),
3396 sizeof (Elf64_External_Dyn),
3397 sizeof (Elf_External_Note),
3398 8, /* hash-table entry size. */
3399 1, /* internal relocations per external relocations. */
3400 64, /* arch_size. */
3401 3, /* log_file_align. */
3402 ELFCLASS64, EV_CURRENT,
3403 bfd_elf64_write_out_phdrs,
3404 bfd_elf64_write_shdrs_and_ehdr,
3405 bfd_elf64_write_relocs,
3406 bfd_elf64_swap_symbol_in,
3407 bfd_elf64_swap_symbol_out,
3408 bfd_elf64_slurp_reloc_table,
3409 bfd_elf64_slurp_symbol_table,
3410 bfd_elf64_swap_dyn_in,
3411 bfd_elf64_swap_dyn_out,
3412 bfd_elf64_swap_reloc_in,
3413 bfd_elf64_swap_reloc_out,
3414 bfd_elf64_swap_reloca_in,
3415 bfd_elf64_swap_reloca_out
3416 };
3417
3418 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3419 #define TARGET_BIG_NAME "elf64-s390"
3420 #define ELF_ARCH bfd_arch_s390
3421 #define ELF_MACHINE_CODE EM_S390
3422 #define ELF_MACHINE_ALT1 EM_S390_OLD
3423 #define ELF_MAXPAGESIZE 0x1000
3424
3425 #define elf_backend_size_info s390_elf64_size_info
3426
3427 #define elf_backend_can_gc_sections 1
3428 #define elf_backend_can_refcount 1
3429 #define elf_backend_want_got_plt 1
3430 #define elf_backend_plt_readonly 1
3431 #define elf_backend_want_plt_sym 0
3432 #define elf_backend_got_header_size 24
3433 #define elf_backend_rela_normal 1
3434
3435 #define elf_info_to_howto elf_s390_info_to_howto
3436
3437 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3438 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3439 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3440
3441 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3442 #define elf_backend_check_relocs elf_s390_check_relocs
3443 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3444 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3445 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3446 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3447 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3448 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3449 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3450 #define elf_backend_relocate_section elf_s390_relocate_section
3451 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3452 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3453 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3454
3455 #define bfd_elf64_mkobject elf_s390_mkobject
3456 #define elf_backend_object_p elf_s390_object_p
3457
3458 #include "elf64-target.h"